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Surface Energy of Biomaterials Depending on Contact Angle: Effect of Pulsed Laser Deposition on Contact Angle
Abstract
One of the essential characteristics of biomaterial implants is the wettability, which acts as a rising function in daily life. Profiting from the revelation of biological models and improving manufacturing technology, the aim of this research was the investigation of the effects of surface modification on the wettability of nitinol surface alloys as biomaterials by using pulsed laser deposition (PLD) as a type of physical vapor deposition method. The deposited film after the PLD method was a diamond-like carbon, using distilled water and body fluids as ringer solutions, as well as fetal bovine serum to find contact angles among them and the surface energy of biomaterials. The advancing angle, receding angle, and equilibrium contact angle of nitinol before and after deposition were calculated. There was decreasing surface energy of all surfaces after deposition with increasing in contact angle. After 300 pulses and 200 mJ, the specimen 203PLD had the lowest value of equilibrium contact in fetal bovine serum at 39.466° and the highest value with water and ringer solutions at 65.102° and 63.128°, respectively.
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